Tricks & Hacks

Question 1

Multiplication by 5 (Even Numbers)

568x5

Answer 1

Divide by 2, add 0 to the last number

2840

Question 2

Multiplication by 5 (Odd Numbers)

479x5

Answer 2

Divide by 2, and 5 to the last digit

2395

Question 3

Convert Fractions to Decimal Numbers
(Denominator is divisible by 5/10/100)

3/5

Answer 3

Equate to 100, lowest term
Divide denominator, Multiply numerator
Convert to decimal

3/5 = 60/100 = 0.6

Question 4

Convert Fractions to Decimal Numbers
(Denominator is NOT divisible by 5/10/100)

1/8

Answer 4

Divide the numerator by the denominator

0.125

Question 5

Convert Decimals to Fraction

0.17

Answer 5

Make 1 denominator,
0.17/1

Add zeroes kung ilang decimal moves para maging whole number
0.17/100

Simplify
17/100

Question 6

Convert Decimals to Percentages (Non-Repeating Numbers)

12.4

Answer 6

D -> P, going to the RIGHT
move 2 decimal places

1240%

Question 7

Convert Decimals to Percentages (Repeating Numbers)

9.4555

Answer 7

D -> P, going to the RIGHT
move 2 decimal places from its DECIMAL POINT

945.55%

Question 8

Convert Percentages to Decimals (Repeating Numbers)

85%

Answer 8

D

Question 9

Convert to Decimal

12.55%

Answer 9

0.1255